9S12HY32 View Datasheet(PDF) - Freescale Semiconductor
Part Name
Description
MFG CO.
'9S12HY32' PDF : 790 Pages View PDF
2.3.44 Port H Polarity Select Register (PPSH)
Port Integration Module (S12HYPIMV1)
Address 0x0265
R
W
Reset
7
PPSH7
1
1 Read: Anytime.
Write: Anytime.
6
PPSH6
5
PPSH5
4
PPSH4
3
PPSH3
2
PPSH2
1
1
1
1
1
Figure 2-42. Port H Polarity Select Register (PPSH)
Access: User read/write1
1
0
PPSH1
PPSH0
1
1
Table 2-41. PPSH Register Field Descriptions
Field
7-0
PPSH
Description
Port H pull device select—Determine pull device polarity on input pins
This register serves a dual purpose by selecting the polarity of the active interrupt edge as well as selecting a pull-up
or pull-down device if enabled.
1 A rising edge on the associated Port H pin sets the associated flag bit in the PIFH register. A pull-down device is
connected to the associated Port H pin, if enabled by the associated bit in register PERH and if the port is used
as input.
0 A falling edge on the associated Port H pin sets the associated flag bit in the PIFH register.A pull-up device is
connected to the associated Port H pin, if enabled by the associated bit in register PERH and if the port is used
as input.
2.3.45 Port H Wired-Or Mode Register (WOMH)
Address 0x0266
R
W
Reset
7
WOMH7
0
1 Read: Anytime.
Write: Anytime.
6
WOMH6
5
WOMH5
4
WOMH4
3
WOMH3
2
WOMH2
0
0
0
0
0
Figure 2-43. Port H Wired-Or Mode Register (WOMH)
Access: User read/write1
1
0
WOMH1
WOMH0
0
0
Table 2-42. WOMS Register Field Descriptions
Field
Description
7-0
WOMH
Port H wired-or mode—Enable wired-or functionality
This register configures the output pins as wired-or. If enabled the output is driven active low only (open-drain). A
logic level of “1” is not driven.This allows a multipoint connection of several serial modules. These bits have no
influence on pins used as inputs.
1 Output buffers operate as open-drain outputs.
0 Output buffers operate as push-pull outputs.
MC9S12HY/HA-Family Reference Manual, Rev. 1.02
Freescale Semiconductor
101
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